MLB Population Averages (2020 - 2022)

Note Recategorizations:
“Sliders” includes Slurves and Sweepers
“Curveballs” includes Knuckle Curves
“Changeup” includes Splitters


Pitch Horizontal Vertical Pitch Proportion Spin Rate
4-Seamer 7.45 14.86 0.46 2285.29
Changeup 14.03 32.27 0.26 1754.87
Curveball 9.45 53.35 0.26 2572.18
Cutter 2.88 25.97 0.34 2380.57
Sinker 15.00 22.89 0.39 2127.16
Slider 6.42 36.28 0.34 2432.44
Splitter 11.71 33.09 0.28 1459.77

Pitch Classifications for Stuff+
Class Stf+ Range
1 < 55
2 < 70
3 < 85
4 < 95
5 < 105
6 < 115
7 < 130
8 < 145
9 < 160
10 ≥ 160 

## Ranger result
## 
## Call:
##  ranger(woba ~ ., data = tree_input, num.trees = 1000, importance = "impurity") 
## 
## Type:                             Regression 
## Number of trees:                  1000 
## Sample size:                      2074 
## Number of independent variables:  18 
## Mtry:                             4 
## Target node size:                 5 
## Variable importance mode:         impurity 
## Splitrule:                        variance 
## OOB prediction error (MSE):       0.002031347 
## R squared (OOB):                  0.5915524

Pitch-by-Pitch Breakdowns:


Variable Importance Plots

Note that in addition to the aforementioned reclassification of pitch types, Sinkers, Cutters, and Four-Seam Fastballs have been aggregated into a singular “Fastball” category.

wOBA

Sliders

Fastballs

Curveballs

Change-Ups

xwOBA

Sliders

Fastballs

Curveballs

Change-Ups

Decision Trees

Sliders

Four-Seams

Cutters

Sinkers

Curveballs

Change-Ups

Pitch Characteristics

wOBA

Sliders

Fastballs

Curveballs

Change-Ups

xwOBA

Sliders

Fastballs

Curveballs

Change-Ups